Bodybuilding.net - Bodybuilding Forum

Agree with gt55yw, do shrugs on your back day, ditch the power clean and add in DB and BB shoulder presses, and obviously drop your reps to 6-8 if you're looking to gain.

If you have a trainer you should speak to him about the shoulder workouts. I think you have been working out for a while. So you should be able to do some split workouts.
Workouts like, military press, lats, shrugs would help both gain and isolate those muscles.